Tammo Harder

Early career

Born in Dülmen, Harder began with SV Fortuna Seppenrade, but left for Borussia Dortmund's youth system at the age of eight in 2002. After four years in Dortmund's youth system, he joined rivals Schalke to play for their youth team, despite being a Dortmund fan. At Schalke, he would consistently be one of the best players and top scorers, winning the Under 19 Bundesliga in 2012 and scored 20 goals to win it again in the 2012/13 season.

Borussia Dortmund II

Harder returned to Dortmund in 2013, after running down his contract with Schalke, signing with Dortmund a contract valid until 2016. He made his professional debut in the 3. Liga with Borussia Dortmund II on 20 July 2013 against VfB Stuttgart II. As his contract was expiring, he attracted interest from numerous clubs in the summer of 2016, including various German clubs and Huddersfield, where his former coach David Wagner had gone to.

Holstein Kiel and Saarbrücken loan

Harder chose to sign with Holstein Kiel, with it being announced on 22 June 2016. He would score on his debut on 9 August 2016 against Sportfreunde Lotte in a 3-1 victory, but only made two more appearances over the rest of the season for Holstein Kiel. In the 2016–17 winter transfer window, he joined 1. FC Saarbrücken for the second half of the season. At Saarbrücken, he played 5 Regionalliga Südwest matches. In July 2017, Harder's contract at Holstein Kiel was terminated. However, there was not much interest for…

Harder has made 6 appearances for Germany's youth teams, scoring one goal in the Euro U19 against Ukraine in a 2-0 victory on 25 July 2014.